import Image from "next/image";
import Link from "next/link";
import type { Metadata } from "next";
import { notFound } from "next/navigation";
import { ArrowLeft, Building2, Calendar, Clock, ExternalLink, Tag } from "lucide-react";
import { renderContent } from "@/lib/content-render";
import { getProjectBySlug, listProjects } from "@/lib/data";
import { buildMetadata } from "@/lib/seo";
import { Gallery } from "@/components/gallery";
import { TrendingUp } from "lucide-react";
import type { ProjectMetric } from "@/lib/types";

function parseMetrics(items?: string[] | null): ProjectMetric[] {
  if (!items) return [];
  const out: ProjectMetric[] = [];
  for (const raw of items) {
    try {
      const obj = JSON.parse(raw) as Partial<ProjectMetric>;
      if (obj.value && obj.label) out.push({ value: obj.value, label: obj.label });
    } catch {
      const [value, label] = raw.split("|").map((s) => s.trim());
      if (value && label) out.push({ value, label });
    }
  }
  return out;
}

export async function generateMetadata({
  params,
}: {
  params: Promise<{ slug: string }>;
}): Promise<Metadata> {
  const { slug } = await params;
  const project = await getProjectBySlug(slug);
  if (!project) return { title: "Proje bulunamadı" };
  return buildMetadata(`/projeler/${slug}`, {
    title: project.title,
    description: project.description.slice(0, 160),
    openGraph: {
      title: project.title,
      description: project.description.slice(0, 160),
      images: project.image_url ? [{ url: project.image_url }] : undefined,
      type: "article",
    },
  });
}

export default async function ProjectDetailPage({
  params,
}: {
  params: Promise<{ slug: string }>;
}) {
  const { slug } = await params;
  const project = await getProjectBySlug(slug);
  if (!project) notFound();

  const html = renderContent(project.content);

  const metrics = parseMetrics(project.metrics);

  const meta: { icon: React.ReactNode; label: string; value: string }[] = [];
  if (project.client_name)
    meta.push({ icon: <Building2 className="size-4" />, label: "Müşteri", value: project.client_name });
  if (project.industry)
    meta.push({ icon: <Tag className="size-4" />, label: "Sektör", value: project.industry });
  if (project.duration)
    meta.push({ icon: <Clock className="size-4" />, label: "Süre", value: project.duration });
  if (project.year)
    meta.push({ icon: <Calendar className="size-4" />, label: "Yıl", value: String(project.year) });

  const relatedProjects = (
    await listProjects({ limit: 4 })
  ).filter((p) => p.$id !== project.$id).slice(0, 3);

  return (
    <>
      <section className="border-b border-[var(--border)]">
        <div className="mx-auto max-w-7xl px-6 py-12">
          <Link
            href="/projeler"
            className="inline-flex items-center gap-1 text-sm text-[var(--muted)] hover:text-[var(--navy)]"
          >
            <ArrowLeft className="size-3.5" /> Tüm projeler
          </Link>

          <div className="mt-6 grid items-start gap-10 lg:grid-cols-[1.4fr_1fr]">
            <div>
              {project.category && (
                <span className="inline-flex rounded-full bg-[var(--sky-50)] px-3 py-1 text-xs font-medium text-[var(--sky-600)]">
                  {project.category}
                </span>
              )}
              <h1 className="mt-3 text-4xl font-bold tracking-tight text-[var(--navy)] sm:text-5xl">
                {project.title}
              </h1>
              <p className="mt-4 text-lg leading-relaxed text-[var(--muted)]">
                {project.description}
              </p>

              {project.live_url && (
                <a
                  href={project.live_url}
                  target="_blank"
                  rel="noopener noreferrer"
                  className="mt-6 inline-flex items-center gap-2 rounded-full bg-[var(--navy)] px-5 py-2.5 text-sm font-medium text-white transition hover:bg-[var(--navy-700)]"
                >
                  Projeyi canlı görüntüle
                  <ExternalLink className="size-4" />
                </a>
              )}

              {project.technologies && project.technologies.length > 0 && (
                <div className="mt-8">
                  <p className="text-xs font-semibold uppercase tracking-wider text-[var(--muted)]">
                    Teknolojiler
                  </p>
                  <div className="mt-2 flex flex-wrap gap-1.5">
                    {project.technologies.map((t) => (
                      <span
                        key={t}
                        className="rounded-md bg-[var(--navy-50)] px-2.5 py-1 text-xs text-[var(--navy-700)]"
                      >
                        {t}
                      </span>
                    ))}
                  </div>
                </div>
              )}
            </div>

            {meta.length > 0 && (
              <dl className="grid grid-cols-2 gap-4 rounded-2xl border border-[var(--border)] bg-white p-6">
                {meta.map((m) => (
                  <div key={m.label}>
                    <dt className="flex items-center gap-1.5 text-xs font-medium uppercase tracking-wider text-[var(--muted)]">
                      {m.icon}
                      {m.label}
                    </dt>
                    <dd className="mt-1 text-sm font-semibold text-[var(--navy)]">
                      {m.value}
                    </dd>
                  </div>
                ))}
              </dl>
            )}
          </div>

          {project.image_url && (
            <div className="relative mt-10 aspect-video overflow-hidden rounded-2xl">
              <Image
                src={project.image_url}
                alt={project.title}
                fill
                sizes="(min-width: 1024px) 1024px, 100vw"
                className="object-cover"
                priority
              />
            </div>
          )}

          {metrics.length > 0 && (
            <div className="mt-10">
              <p className="flex items-center gap-1.5 text-xs font-semibold uppercase tracking-[0.18em] text-[var(--sky-600)]">
                <TrendingUp className="size-3.5" />
                Sonuçlar
              </p>
              <div className="mt-4 grid gap-4 sm:grid-cols-2 lg:grid-cols-4">
                {metrics.map((m, i) => (
                  <div
                    key={i}
                    className="rounded-2xl border border-[var(--border)] bg-gradient-to-br from-white to-[var(--sky-50)]/40 p-6"
                  >
                    <p className="text-3xl font-bold text-[var(--navy)] md:text-4xl">
                      {m.value}
                    </p>
                    <p className="mt-1 text-xs text-[var(--muted)]">
                      {m.label}
                    </p>
                  </div>
                ))}
              </div>
            </div>
          )}
        </div>
      </section>

      <div className="mx-auto max-w-5xl px-6 py-16">
        {html && (
          <article
            className="prose prose-lg max-w-none text-[var(--foreground)]"
            dangerouslySetInnerHTML={{ __html: html }}
          />
        )}

        {project.gallery && project.gallery.length > 0 && (
          <section className={html ? "mt-16" : ""}>
            <h2 className="text-2xl font-bold text-[var(--navy)]">Galeri</h2>
            <p className="mt-1 text-sm text-[var(--muted)]">
              Görsellerin üzerine tıklayarak büyütebilirsiniz.
            </p>
            <div className="mt-6">
              <Gallery images={project.gallery} alt={project.title} />
            </div>
          </section>
        )}
      </div>

      {relatedProjects.length > 0 && (
        <section className="border-t border-[var(--border)] bg-[var(--navy-50)]/40 py-16">
          <div className="mx-auto max-w-7xl px-6">
            <h2 className="text-2xl font-bold text-[var(--navy)]">
              Diğer projeler
            </h2>
            <div className="mt-8 grid gap-6 md:grid-cols-3">
              {relatedProjects.map((p) => (
                <Link
                  key={p.$id}
                  href={`/projeler/${p.slug}`}
                  className="group overflow-hidden rounded-2xl border border-[var(--border)] bg-white transition hover:shadow-lg"
                >
                  <div className="relative aspect-video overflow-hidden bg-[var(--navy-50)]">
                    {p.image_url ? (
                      <Image
                        src={p.image_url}
                        alt={p.title}
                        fill
                        sizes="(min-width: 1024px) 33vw, 100vw"
                        className="object-cover transition group-hover:scale-105"
                      />
                    ) : (
                      <div className="flex h-full items-center justify-center text-3xl font-bold text-[var(--navy)]/30">
                        {p.title.charAt(0)}
                      </div>
                    )}
                  </div>
                  <div className="p-5">
                    <h3 className="font-semibold text-[var(--navy)] group-hover:text-[var(--sky-600)]">
                      {p.title}
                    </h3>
                    <p className="mt-1 text-xs text-[var(--muted)]">{p.category}</p>
                  </div>
                </Link>
              ))}
            </div>
          </div>
        </section>
      )}
    </>
  );
}